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Post-Employment Benefits - Summary of Present Value of the Defined Benefit Obligation (Detail) - SEK (kr) kr in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | kr 86,598 | kr 85,535
Of which partially or fully funded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 82,783 | 81,900
Of which unfunded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 3,815 | 3,635
Sweden [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 49,423 | 50,043
Sweden [member] | Of which partially or fully funded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 49,423 | 50,043
Sweden [member] | Of which unfunded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 0 | 0
US [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 5,340 | 5,073
US [member] | Of which partially or fully funded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 4,823 | 4,560
US [member] | Of which unfunded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 517 | 513
United Kingdom [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 10,473 | 10,595
United Kingdom [member] | Of which partially or fully funded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 10,473 | 10,595
United Kingdom [member] | Of which unfunded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 0 | 0
Other Countries [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 21,362 | 19,824
Other Countries [member] | Of which partially or fully funded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | 18,064 | 16,702
Other Countries [member] | Of which unfunded [member] |  |
Present Value Of Defined Benefit Obligation [Line Items] |  |
Defined benefit obligation (DBO) | kr 3,298 | kr 3,122

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- Definition Present value of defined benefit obligation. + References No definition available. + Details
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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard -URIDate 2024-03-27 + Details
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